The Story of My life Character Sketch

The Story of My life Character Sketch

Anne Sullivan : (Helen Keller’s teacher)

A bright beam of light entered Helen’s life in the form of Anne Sullivan when she was just seven years old. Miss Sullivan became Helen’s teacher on 3 March 1887. Helen called the day her ‘soul’s birthday’. From the time she took over as Helen’s tutor, till the day she breathed her last, She was a brilliant teacher, who had immense patience and compassion to touch the heart of the wild, young girl imprisoned in a world that was dark and silent. She was a constant companion, a mentor, a teacher and a friend to Helen. Being blind herself, she knew about the difficulties that Helen had to face. Her methods of teaching were highly innovative and in tune with nature. She was the embodiment of love and patience. It was her expertise, patience and love that helped Helen learn everything she knew and understood about the world. These qualities helped her to deal with a rebellious and active child in the most efficient manner. Though she helped Helen in whatever she did, she understood that Helen was able to stand on her own legs. By taking Helen out with her, she gave her a feel of nature and its beauty. She taught her manual alphabet and helped her to communicate with the world. Her nurturing and loving care helped Helen grow into a perfect adult, all selfless and compassionate. No wonder Helen herself acknowledged- “there is not a talent, or an inspiration or a joy in me that has not been awakened by her loving touch.”

Michael Anagnos (Director of the Perkins Institution for the Blind) 

Mr Anagnos was an Orthodox immigrant from Greece. He was the Director of the Perkins Institution for the Blind. It was he who sent Miss Sullivan to Keller’s home. Later on, he and Helen became friends. He encouraged Helen and always appreciated her compositions. He got -The Frost King” written by Helen published in the Institute’s journal. But later the accusation of Helen of plagiarism was a bolt from the blue not only or Helen but also for Anagnos. He felt that Helen had cheated him. Mr Anagnos’ belief that she had intentionally plagiarised the composition broke Helen’s heart. Her pleadings of love and innocence fell to deaf years. This incident ended the relationship between the two.

 Kate Adams Keller (Helen’s Mother):  

Helen’s mother, Kate Adams Keller, was the second wife of her father and twenty years his junior. She is portrayed as a positive, patient individual, who loved Helen in spite of her disabilities, and understood her struggles and frustrations. Mrs Keller was very intelligent, widely read, and had an excellent memory. She never raised her voice at Helen, but patiently dealt with her problems. Helen was regarded by her relatives ‘as a monster,’ and one of them even suggested to Kate that she was ‘a mental defective’ who would be far better off in an institution. But Kate would not hear of it. Helen clung to her mother’s skirts all day, and Kate’s intense suffering over her beloved daughter was obvious to her friends and family. She was wise enough to find her a good teacher and sent her to Perkins School for the Blind. Later, she supports Helen’s desire for a formal education in school and college. She seemed determined to help Helen lead a normal life. In spite of her other responsibilities, her dedication to Helen was complete and unquestionable. She was witty and rather high-voiced. While the Kellers raised almost everything they needed on their farm, they were not wealthy. Although she had grown up as a Memphis Belle, her life after marriage was of a rugged frontierswoman. Kate lived to be in her eighties.

Captain Arthur H Keller (Helen’s Father):

Like his wife, Helen’s father, Captain Arthur H Keller, too appears to be a supportive figure in Helen’s life. He left the Confederate army and became the editor and proprietor of the North Alabamian, a weekly newspaper until 1885. Later, he was appointed US Marshall for the Northern District of Alabama. He was brave, honest, competent, and respected by his fellow citizens. Helen’s father showed great love and care towards her. Without his support, Helen could not have gone to study in the institutes and schools that she went to, nor could she have enjoyed her time in the countryside and indulged in so many diverse activities. He was a great storyteller and spent hours recounting numerous stories to her. He did not try to discipline her in a harsh way but tried to help her come out of her frustrations by being supportive. Arthur died of a heart attack when Helen was sixteen and Helen mourned his loss greatly.

Mildred:  (Helen’s younger sister) 

She was Helen’s younger sister and was five years younger than her. Helen was extremely jealous of Mildred as a child and once overturned her cradle. Mildred might have died if her mother had not caught her before she fell on the floor. Later, Helen and Mildred became very attached to each other. She appears to have been very close to Helen, who loved her dearly and expressed her happiness to be near her, for instance, when Mildred also enrolled in the same school, Wellesley, as Helen, she was ecstatic. There are references to happy times the two sisters spent outdoors, exploring the beauty of nature in their own different ways. Apart from the single outburst, when Helen had thrown baby Mildred out of the cradle, the two sisters appear to have been very close.

Questions and Answers Related to The Story of My Life characters

Q1. Describe the role that Anne Sullivan played in helping Helen Keller.

Answer- Anne Sullivan played an extremely important role in helping Helen interact with the people around her. She was the person who helped change the wild little girl into a civilised educated young lady who became an inspiration for others like her. It is after her arrival that Helen experienced the first stirrings of her conscience. Anne’s patience and compassion helped Helen to discover the world around her. It was her creativity and her expertise that helped Helen to learn diverse subjects like geography, biology, history and the languages, as well as a normal person, does. It was with Anne’s help in school and college that Helen could follow the lessons and lectures being delivered by the teachers there. Anne Sullivan dedicated her own life to help Helen to lead as normal a life as possible. She was the key factor in Helen Keller’s growth and accomplishments.

Q 2. The story of Helen Keller is dominated by two themes—determination and perseverance. Throw light on Helen Keller’s character keeping these themes in mind.

Answer- The story has rightly been called an example of perseverance and determination. It shows how Helen struggles in spite of being blind and deaf to communicate with those around her. It is her sheer determination to go to the school that makes her work hard and in a painstaking manner till she is admitted in the school and college of her dreams. For a child who spends the first few years of her life in a deaf and dumb world, she is helped by her teacher to identify objects, to articulate words and finally to communicate intelligently with those around her both by speech and writing. At first, she only understands the people around her when they spell words onto her hand and by reading their lips. Slowly she learns to articulate words from the vibration of the words by placing her hands on their throats. Throughout, she does not give up, despite the frustratingly slow pace of the learning process.

Q 3. While the story is entertaining, the author’s main purpose was probably to inform others about what life is like for people with visual and or hearing impairments. Do you agree?

Answer- I agree with the statement because the whole story highlights the problems that people like Helen face due to their handicaps. It not only creates awareness about the problems of people like Helen but also helps us to appreciate our sight, hearing and speech which we otherwise take for granted. The story talks of the great efforts made by Miss Sullivan to educate Helen and Helen’s own determination to live as normal a life as possible. Her story thus focuses on what an important role is played by a good teacher, and how a student who is truly thirsty for knowledge responds to the teacher’s efforts. The entire story acts as an inspiration for people suffering from similar handicaps, giving them hope of achieving similar successes if they are determined enough.

Q 4. Write a brief paragraph expressing your opinion about whether Helen Keller’s accomplishments were due more to her own determination or to Anne Sullivan’s.

 This question could have two answers:

Answer.  A., In my opinion, Helen Keller’s achievements were more due to her own determination. Miss Sullivan, of course, did play an important role in her successes but she could not have done much if Helen had not been open to her teaching. It was Helen who had to understand the figures being written on her hand and to read the lips of those around her. Her keen sense of touch and smell also helped her to understand the world around her. She was also very intelligent and understood things around her by intuition. She also reveals a lot of determination on her own because she would not have gone to school or college if she had not been very keen to do so. In fact, in college Miss Sullivan was not of much help because she could not take down the notes as fast as required and Helen had to devise her own method to both take down the notes and answer them which she did on the typewriter. It was Helen’s own efforts that helped her to articulate the words and learn to speak. She would tirelessly repeat the words until she got the pronunciation right.

B, In my opinion, Helen Keller could not have achieved much without the help of her teacher Miss Sullivan. Before the coming of Miss Sullivan, Helen had been like a wild child who was difficult to handle, even for her parents. In fact, we find her locking her mother in the kitchen and laughing outside at her mother’s plight, and almost killing her baby sister Mildred by throwing her out of the cradle. It is only with the arrival of Miss Sullivan that Helen herself says she is able to feel remorse and guilt for the first time. It is her teacher who introduces her to words and then helps her understand words to express abstract feelings. In fact, the effort of the teacher can be traced in the letters that she writes to the various people given at the end of the story. We see her progress from words to sentences and then paragraphs. In fact, there is no single achievement that she is able to make without the support and guidance of her teacher. Even while learning to speak, it is her teacher who helps her pronounce the words correctly. The teacher accompanies her to the various schools she goes to, including college, and helps her all the time to make sense of the world around her. Undoubtedly one cannot undermine the significant role played by her teacher, Anne Sullivan, in helping Helen Keller lead a normal and highly successful life. ‘The most important day I remember in all my life is the one on which my teacher, Anne Mansfield Sullivan, came to me. I am filled with wonder when I consider the immeasurable contrast between the two lives which it connects.’ Keeping this statement in mind, describe the teacher-student relationship between Anne Sullivan and Helen. The relationship between Helen and her teacher as depicted in the story is much more than a normal teacher-student relationship. The teacher here not only teaches her academic subjects but also instils in her a sense of responsibility for her actions. At the beginning, Helen is a wild undisciplined child who cannot be controlled by anyone in the house. In fact, her parents appear completely at a loss on how to deal with her. She locks people up, throws her sister out of her cradle, smashes her doll, almost burns herself, cuts the hair of her friend, to name a few of the wild things she indulges in. It is the teacher who is able to connect with her and give her hope and confidence and help her to make sense of the dark and silent world she is trapped in. Their relationship becomes more of a life-long companionship, as Miss Sullivan accompanies Helen everywhere, and even helps her in college.

Q 5. ‘The mystery was revealed to me. I then knew that ‘w-a-t-er’ meant the wonderful cool something that was flowing over my hand. That living word awakened my soul, gave it light, joy, set it free!!’ What does this tell you about Helen Keller’s character?

Answer- Helen was a deaf and dumb child who had no means of communicating with the outside world before the coming of her teacher Miss Sullivan. She could not feel any softness or sensitivity towards the other people in her environment. It is only when the teacher arrived that she was slowly able to make sense of the world around her. She was an extremely intelligent child and her frustration rose from the fact that she knew that she was denied access to a lot of knowledge and experience because of her blindness and deafness. When Miss Sullivan started teaching her by spelling words on her hand, Helen was finally able to correlate the abstract words with the tangible world around her. Thus, she realised what ‘water’ meant and finally, realised that shop he had found the means to understand the world. This made her feel very happy and hopeful. Her joy at being able to identify the objects around her in this manner reveals her deep thirst for knowledge and her quick intelligence in being able to pick up and learn so quickly. All her achievements later on in her life were due to her keen interest and determination to excel and overcome her handicap. In fact, the joy that she gets at being able to express herself lifts her spirits and gives her a deep joy that helps her set herself free from the bounds of her disability. She triumphs over her problems and evolves into a great human being.

Q 6. Do you think Helen would have been able to succeed in life without her parents’ support? Explain.

Answer- Helen’s parents played a very important role in her success. Firstly, they gave her love and support throughout her life. They showed enormous patience in dealing with her tantrums and helped her cope with her disabilities. They understood her frustration and the challenges she had to face to accomplish the simplest of tasks. Her parents tried all avenues to help her, be it taking her to the oculist, or to the blind school. They hired Miss Sullivan as her teacher, and this gave Helen a new life. Later, they made sure that Helen had the chance to go to a school and college of her choice. While Helen herself worked hard to achieve each milestone, she could not have gone far if her parents had not supported her financially, emotionally and mentally. Even after her father’s death, her education was not compromised. Nowhere do her parents seem to regret or resent having to care for a child with disabilities.

Q 7. How would you describe Helen’s relationship with her sister Mildred?

Answer-  Helen and her younger sister Mildred appear to have had a very close relationship. In the beginning, when Helen was a child, she was unable to accept the new baby, and almost killed her by overturning the cradle. However, this was not intentional, and only expressed the feelings of a young child, trapped in a dark, silent world. With the coming of Miss Sullivan and Helen’s gradual exploration of the world, this frustration lessened and she found herself able to understand feelings of love and affection. With this growing sensitivity, there was a strong bond which developed between the two sisters. As young girls, they often went on walks and explored the world around them. Later, they went to the same school, which made Helen very happy.

Q 8. Do you think Helen could have achieved success if her parents had not been wealthy?  This question could have two answers:

Answer- A No, I don’t think it would have been possible for Helen to achieve success if her parents had not been wealthy enough. Helen’s first successful communication took place only after her teacher arrived. However, Miss Sullivan was a live-in teacher, who stayed with them for many years. A family with less money could never have afforded this expense. Secondly, her family took her on several trips and she had the luxury of experiencing the sea, the forests, the city, etc. All this needed money, and it would not have been possible for her to understand what the world around her was like, otherwise. Finally, Helen gained an understanding that went beyond just learning about the world. She went to school and then to college. She had private tutors from time to time. She also interacted with different people and took an interest in analysing the situations around her. This advanced engagement with the world was only possible because of the financial support of her parents, which ensured that she had every experience and advantage possible.

Yes, I feel that Helen could still have been a success, even if her parents had not been from a wealthy background. This is because right from her childhood, she seems to have been very determined, and very intelligent. She took an initiative to learn more, and that is what pushed her ahead, throughout life. In fact, it is quite possible that the only reason her parents invested so much money in her education was simply that to, begin with, Helen was such a bright and promising girl. Even if they had not had that much money, her struggle against her disability would have continued. Her success may have taken longer, and the road may have been tougher in some respects. However, it is only when there is a will that a person can rise above a disability so spectacularly, and this will would have seen Helen rise, no matter what.

Q 9. Helen’s mother was the strongest foundation of Helen’s life. Describe?

Answer- Helen’s illness had left the titinily broken especially her mother. She could not sit back and see her daughter suffer. Much before Helen’s temper tantrums began, her mother had already cloned the groundwork to see if there was any scope of educating for her little girl. She contacted doctors to help cure Helen. Her efforts were rewarded when Mrs Anne Sullivan was sent to their house to teach Helen.

Q 10. Sketch the character of Helen as an eager student?

Answer- Though Helen was an eager and quick learner, yet she was impatient and rarely took it favourably to be contradicted. After she had been gifted by all that Ms Sullivan had got for her, the teacher tried to impress upon her young student the fact that do-l-1 was the name of the particular object. Later she endeavoured to tell that mug and watt-er were two different things. This repeated drill annoyed Helen so much that she dashed the doll gifted to her by Ms Sullivan. Not to be deterred by this sight, took Helen to the good house where someone was drawing water. She placed Helen’s hand under running water and spelt the word into her hand repeatedly. It did not take long for Helen’s receptive mind to grasp what was being told to her. She felt her soul awakening to a new world.

Q 11. Helen learnt from life itself. What role did her teacher play in it?

Answer- Helen’s teacher taught her by illustrating a story or a poem and she kept on learning grammar, hard sums, definition, etc. She learnt all these lessons in the lap of nature- sometimes amongst the flowers and sometimes in the orchard. Helen learnt Geography, Arithmetic. Zoology and Botany all in a leisurely manner. Arithmetic seemed a disinteresting subject to Helen. In science. she was taught the growth of the plant in actual form. She enjoyed her lessons as she learnt them from life itself. But it was all because of her teacher who was teaching her in such a way that everything around her breathed of love, joy and was meaningful. Helen was delighted in the company of her teacher as she had a great influence on her life.

Q 12. Who was Mildred? How did Helen start enjoying her company?

Answer. – Mildred was Helen’s sister. She was a loving girl and enjoyed Helen’s company at the foot of the mountain where there was a railroad and about a mile distant was a trestle spanning a deep gorge. Helen had never actually been there until one day when she, along with her sister and Miss Sullivan, got lost in the woods. They came across the trestle, which was a shortcut to their home. Since they were lost, they decided to take this way in spite of the dangers: the tics were wide apart and quite narrow. Feeling the rails with the toes, Helen moved on the trestle cautiously but without fear. Suddenly, the train was heard coming in from the other side. They had to climb quickly down upon the cross braces while the train passed by. With some difficulty, they regained the track. When, ultimately, they reached back home, it had grown quite dark and all the family members were out looking for them.

Q.13- How did Mr Anagnos react on Helen’s investigation?

Answer. – Mr Anagnos was a very caring person and he had a deep love and affection for Helen. Helen also respected and admired him. She wrote her very first book ‘The Frost King’ and decided to gift it to Mr Anagnos. Overwhelmed by Helen’s efforts, he got it published only to find that it had been a plagiarised version. This episode led to a lot of bitterness and he assumed that Ms Sullivan and Helen had deliberately cheated on him by stealing someone else work in order to impress him. He broke off all the ties with her. He was so put off that he turned a deaf car to the pleadings of love and innocence.

Electronic Configuration of Iron

Fe Electron Configuration – Properties

Iron mineral

Fe Electron Configuration - Properties 1
Other than being usually found on Earth, it is copious in the sun and stars, as per the Los Alamos National Laboratory. Iron is significant to the survival of living beings, as per Jefferson Lab. In plants, it assumes a job in the generation of chlorophyll. In creatures, it is a segment of haemoglobin — a protein in blood that conveys oxygen from the lungs to the tissues in the body.

90% of all metal that is refined nowadays is iron, as indicated by the Royal Society of Chemistry. A large portion of it is utilized to make steel — a combination of iron and carbon — which is thus utilized in assembling and structural building, for example, to make strengthened cement. Hardened steel, which contains in any event 10.5 per cent chromium, is very impervious to consumption. It is utilized in kitchen cutlery, apparatuses and cookware, for example, hardened steel dish and skillets. The expansion of different components can give steel other valuable characteristics. For example, nickel expands its solidness and makes it progressively impervious to warmth and acids; manganese makes it increasingly sturdy, though tungsten causes it to keep up hardness at high temperatures, as per Jefferson Lab.

Here are some facts about Iron

• Nuclear (number of protons in the core): 26

• Nuclear image (on the Periodic Table of Elements): Fe

• Nuclear weight (normal mass of the molecule): 55.845

• Thickness: 7.874 grams per cubic centimetre

• State at room temperature: Solid

• Dissolving point: 2,800.4 degrees Fahrenheit (1,538 degrees Celsius)

• Breaking point: 5,181.8 F (2,861 C)

• Number of isotopes (atoms of a similar component with an alternate number of neutrons): (incorporate what number of are steady isotopes): 33 Stable isotopes: 4.

• Most basic isotopes: Iron-56 (regular bounty: 91.754 per cent

• Blood is red as a result of the association among iron and oxygen, as per the blood looks red on account of the manner by which the substance bonds between the two components reflect light.

• Pure iron is in reality delicate and pliable,

• In 2007, specialists found a gigantic crest of iron-rich water emanating from aqueous vents in the southern Atlantic Ocean.

• Iron is fundamental for the development of phytoplankton — little marine microbes that utilization carbon dioxide from the air to fuel photosynthesis. A few specialists have along these lines contended that treating the seas with additional iron could help suck up abundance carbon dioxide. In any case, an examination distributed online in November 2010 in the Proceedings of the National Academy of Sciences found this probably won’t be such a smart thought, as this additional iron could really trigger the development of poison creating green growth that add to the pollution of marine untamed life.

• About 90 per cent of all metal that is distilled today is iron.

• Iron is a significant segment of a shooting star class known as siderites,

• An iron column dating to about A.D. 400 still stands today in Delhi, India, as per. The column is about 23.75 feet (7.25 meters) high and measures 15.75 inches (40 centimetres) in distance across. Regardless of being presented to climate conditions, the column has not consumed much because of its remarkable piece of metals.

• Examples of iron-rich substance incorporate meat, for example, hamburger, turkey, chicken and pork; fish, for example, shrimp, molluscs, shellfish and fish; vegetables, for example, spinach, peas, broccoli, sweet potatoes and string beans; bread and grains, for example, grain oats, entire wheat bread and advanced rice; different nourishments, for example, beans, lentils, tomato glue, tofu and molasses,

• The surface of Mars is red because of a lot of iron oxide (rust) on its surface, Mars has more than twice as much iron oxide in its outside than Earth.

• Earth’s strong internal and fluid external centres are fundamentally made out of iron (around 85 per cent and 80 per cent by weight, separately). The electric flow produced by the fluid iron makes the attractive field securing Earth, as per NASA. Iron is likewise found in the centres of the majority of the planets in the Solar System.

• Iron is the heaviest component framed in the centres of stars, as indicated by JPL. Components heavier than iron must be made when high mass stars detonate.

• The Latin name for iron is ferrum, which is the wellspring of its nuclear image, Fe.

• The word iron is perhaps gotten from before words signifying “heavenly metal” since it was utilized to make the swords utilized in the Crusades.

Electronic Configuration of Iron

Iron is a substance component with a nuclear number 26. It is the most well-known component that is found on the earth. In contrast to that of different components, iron exists at oxidation conditions of – 2 to +6. Basic iron happens in a low-oxygen condition despite the fact that it is receptive to water and oxygen.
Fe Electron Configuration - Properties 2

Iron is portrayed by the capacity to shape variable oxidation expresses that vary in a couple organometallic sciences. Since iron is accessible in bounty in nature, it is some of the time named as a model for the whole square of a change metal. Ferric is the iron mixes, and ferrous is the iron mixes.

Mixes of iron are fundamentally shaped at +2 and +3 oxidation states. They may likewise happen at higher oxidation state + 6. One of the incredible models would be potassium ferrate. In a different biochemical oxidation response, Iron goes about as a middle of the road. Iron can’t achieve an oxidation condition of +8, and it is one of the primary components of its gathering.
Iron does not have 8 valence electrons, it just has 2, here’s the reason.

Oxidation state relies on the valence electrons and valence electrons are the electrons present in the external most shell of an ion

For Fe, n=4, N shell,

In Iron the electronic setup of Fe = 1s2 2s2 2p6 3s2 3p6 4s2 3d6 from the electronic setup and the beneath graph you may have an unmistakable thought regarding valence electrons in the Fe i.e., Iron has just 2 valence electrons.
Fe Electron Configuration - Properties 3
For Fe when two 4s electrons are expelled, it has a +2-oxidation state and electronic arrangement of Fe+2 = 1s2 2s2 2p6 3s2 3p6 3d6

Presently, the n=3 turns into the external most shell, iron can lose electrons from this shell also more explicitly from the 3d subshell which has 6 electrons. When one electron from 3d subshell s expelled, iron has a +3-oxidation state and electronic arrangement of Fe+3 = 1s2 2s2 2p6 3s2 3p6 3d5 +2 and +3 are the normal oxidation conditions of Iron.

Electronic arrangement of iron is [Ar] 3d6 4s2. Irons particular crystalline structure and electronic arrangement make normally alluring to metals. It is named as ferromagnetic materials. Iron displays diverse sorts of allotropic structures despite the fact that they don’t contain a solitary crystalline structure. There are allotropic types of iron and are named as alpha, delta and gamma iron.

Iron displays these three allotropic structures at various temperatures when it chills off to liquid structure. The electronic setup of Fe2+ is 1s2 2s2 2p6 3s2 3p6 3d6 and Fe3+ is 1s2 2s2 2p6 3s2 3p6 3d5. Fe2+ contains 2 lesser electrons contrasted with electronic design of Fe.

Applications of Iron

  • Nitrates and iron chloride are utilized as modern reagents. The iron sulphate is utilized in the fungicide.
  • They are usually utilized in the assembling of structures of substantial boats, autos, different machine devices and machine parts.
  • Iron Chloride utilized in treating sewage frameworks.
  • Iron Sulphate is utilized to treat Iron Deficiency.
  • Iron is these days utilized in different careful sorts of gear

History and properties of iron

Archaeologists gauge that individuals have been utilizing iron for over 5,000 years, as per Jefferson Lab. Truth be told, incidentally, probably the eldest iron known to people truly tumbled from the sky. In an investigation distributed in 2013 in the Journal of Archaeological Science, analysts analysed antiquated Egyptian iron dabs that date to around 3200 B.C. what’s more, found that they were produced using iron shooting stars. The Old Testament in the Bible additionally makes reference to press on numerous occasions.

Iron is generally acquired from minerals hematite and magnetite. In littler degrees, it can likewise be gotten from the mineral’s taconite, limonite and siderite, as indicated by Jefferson Lab. Iron has four diverse allotropic structures, which implies that it has four distinctive auxiliary structures in which particles bond in various examples. Those structures are called ferrites, known as alpha (which is attractive), beta, gamma and omega.

Iron is an imperative supplement in our eating regimen. Iron inadequacy, the most widely recognized wholesome insufficiency, can cause paleness and exhaustion that influences the capacity to perform physical work in grown-ups. It can likewise hinder memory and other mental capacity in youngsters, Ladies who have iron inadequacy while pregnant are at an expanded danger of having little and early children, the CDC cautions.

There are two sorts of dietary iron: heme iron and non-heme iron. Heme iron — which is the more promptly consumed kind of iron — is found in meat, fish and poultry, while non-heme iron — which is likewise ingested yet to a lesser degree than heme iron — is found in both plant nourishments, (for example, spinach, kale and broccoli) and meat. Individuals ingest up to 30 per cent of heme iron, contrasted with 2 with 10 per cent of non-heme iron, the ARC reports, including that nourishments wealthy in nutrient C, for example, tomatoes or citrus organic products can help ingest individuals assimilate non-heme iron.

Uses of Iron

1. Iron is a mystery – it rusts effectively, yet it is the most essential everything being equal.
2. Most is utilized to make steel, utilized in structural designing (fortified solid, braces and so forth) and in assembling.
3. There are a wide range of sorts of steel with various properties and employments. Normal carbon steel is a composite of iron with carbon (from 0.1% for gentle steel up to 2% for high carbon steels), with little measures of different components.
4. Combination steels are carbon steels with different added substances, for example, nickel, chromium, vanadium, tungsten and manganese. These are more grounded and harder than carbon steels and have a gigantic assortment of uses including spans, power arches, bike chains, cutting apparatuses and rifle barrels.
5. Hardened steel is impervious to consumption. It contains in any event 10.5% chromium. Different metals, for example, nickel, molybdenum, titanium and copper are added to improve its quality and functionality. It is utilized in design, heading, cutlery, careful instruments and adornments.
6. Cast iron contains 3– 5% carbon. It is utilized for funnels, valves and siphons. It isn’t as intense as steel however it is less expensive. Magnets can be made of iron and its amalgams and mixes.
7. Iron impetuses are utilized in the Haber procedure for creating smelling salts, and in the Fischer– Tropsch process for changing over syngas (hydrogen and carbon monoxide) into fluid energizes.
8. Iron is a basic component for all types of life and is non-dangerous. The normal human contains around 4 grams of iron. A great deal of this is in haemoglobin, in the blood. Haemoglobin conveys oxygen from our lungs to the cells, where it is required for tissue breath.
9. People need 10– 18 milligrams of iron every day. An absence of iron will make sickliness create. Sustenance, for example, liver, kidney, molasses, brewer’s yeast, cocoa and liquorice contain a great deal of iron.
10. Iron is the fourth most plentiful component, by mass, in the Earth’s covering. The centre of the Earth is believed to be to a great extent made out of iron with nickel and sulphur.
11. The most well-known iron-containing metal is haematite, yet iron is found generally appropriated in different minerals, for example, magnetite and taconite.
12. Financially, iron is delivered in a shoot heater by warming haematite or magnetite with coke (carbon) and limestone (calcium carbonate). This structures pig iron, which contains about 3% carbon and different debasements, however, is utilized to make steel. Around 1.3 billion tons of unrefined steel are created worldwide every year.

Short Summary of The Story of My Life

Short Summary of The Story of My Life

The story is an inspirational account of the world of a blind and deaf girl, and how she triumphs over her disabilities, going to school and college, facing exams and learning to enjoy the simple things in life. Some of her concerns are common to all young people of her age, but other concerns arose exclusively out of her desire to triumph over her disabilities. The book shows us the perception of a person who has been denied sight and sound and struggles to understand the world and interact with those around her. It also shows us how normal people can help to aid those with disabilities.

Helen Adams Keller was born on 27 June 1880, in the north-west Alabama city of Tuscumbia. Her father was a retired Confederate army captain and editor of a local newspaper The North Alabamian, while her mother, Kate, was an educated young woman from Memphis. Helen had a younger brother, Phillips Brooks and a sister, Mildred.

When Helen was nineteen months old, she was afflicted by an unknown illness, possibly scarlet fever or meningitis, which left her deaf and blind. Helen, who was an extremely intelligent child, tried to understand her surroundings through touch, smell and taste; and by the age of seven, Helen had developed nearly sixty hand gestures to communicate with her parents and ask for things. However, she was often frustrated by her inability to express herself. With the help of her teacher, Anne Sullivan, Helen learned the manual alphabet and started communicating with fingerspelling. Within a few months of working with Anne, Helen’s vocabulary increased to hundreds of words and simple sentences. Anne also taught Helen how to read braille and raised type, and to print block letters. By the age of nine, Helen began to learn to speak and read lips.

Helen attended Perkins School for the Blind for four years. She then spent a year at the Cambridge School for Young Ladies to prepare for Radcliffe College. In 1904, she graduated from Radcliffe and became the first deaf-blind person to earn a Bachelor of Arts degree.

While in college, Keller undertook an essay assignment that eventually took the shape of her autobiography The Story of My Life in 1903. In this book, Helen chronicled her education and the first twenty-three years with her teacher and friend, Anne Sullivan providing supplementary accounts of the teaching process. The autobiography went on to become an almost unparalleled bestseller in multiple languages and laid the foundation of Keller’s literary career.

The Story of My Life by Helen Keller Questions and Answers Chapter Wise

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Glycogen

Glycogen – Structure and Functions of Glycogen

Glycogen, a polysaccharide is the primary storage form of glucose in the human and animal cells for future use. It is present in the form of granules in the cytosol in many cell types. It is a multi-branched polysaccharide of glucose that remains as a form of energy storage in humans, fungi, animals, and bacteria. It is stored in the liver, muscle, and skeletal cells.

Structure of Glycogen:

Glycogen can be organized in a spherical form in which the glucose chains are structured around a core protein of glycogen with 38,000 molecular weight and it looks like branches of tree originated from a center point.

A branched polymer of glucose is called glycogen. The glucose residues are associated linearly by α-1, 4 glycosidic bonds and nearly 8- 10 residues a chain of glucose branches off through α-1, 6 glycosidic linkages. Helical polymer structure is formed by the α- glycosidic bonds.

Granules in the cytoplasm are formed by hydrating glycogen with 3-4 parts of water which will be 10-40 nm in diameter. At the core of glycogen, the granule is located the protein glycogen in which is involved in glycogen synthesis. It is an analog of starch which is the important form of storage of the glucose in most plants also starch has few branches and it will be in less compact when compared to the glycogen.
Glycogen - Structure and Functions of Glycogen 1

Functions of Glycogen:

In human beings and animals, glycogen is found mainly in the liver and muscle cells. It is synthesized from glucose when the sugar level in the blood is high and it serves as a ready source of glucose for the tissues throughout the entire body when sugar level in the blood reduces.

Muscle Cells:

Glycogen accounts for only 1-2% of the muscles by weight. Though, given the greater mass of muscle in the body, the total amount of glycogen storage in the muscles will be greater than that of the storage in the liver. The glycogen present in the muscles is provided only to the muscle cell itself. The enzyme glucose-6-phosphate will not be expressed by the muscle cells that will be required to release the glucose into the bloodstream.

The energy is provided to the muscles during any exercise or stress is experienced by the body. It is done by the breakdown in the muscle fibers of the glucose-1 phosphate produced from glycogen and converting into glucose-6 phosphate.

Liver Cells:

In the liver cells, the glycogen makes up to 6-10% of the liver by weight. If the food taken is not digested, then the blood glucose level increases and the insulin are released from the pancreas promoting the uptake of glucose into the liver cells. The enzymes involved in the glycogen synthesis are activated by the insulin.

When the insulin and the glucose levels are high, the glycogen chains by the addition of glucose molecules are extended and this process is called glycogenesis. The glycogen synthesis ceases as the glucose level and the insulin level decreases. If there is a decrease in the blood sugar level below a certain level, the glucagon released from the pancreas gesture the liver cells to break down glycogen. The glycogenesis process occurs and the glucose is released into the bloodstream.

Hence the glycogen will serve as the main shield of blood glucose level by storing the glucose during high sugar level in the blood and releasing it when the sugar level is low. Simply glycogen breakdown for supplying glucose will not be sufficient to meet the energy needs of the body so, in addition to this glucagon, cortisol, epinephrine and norepinephrine will also stimulate the breakdown of glycogen.

Other Tissues:

Glycogen can also be found in smaller amounts in other tissues like kidney, white blood cells, and red blood cells and in addition to the muscle and liver cells. In order to provide the energy needs of the embryo, the glycogen will be used to store the glucose in the uterus. The glycogen after the breakdown will enter the glycolytic or pentose phosphate pathway or it will be released into the bloodstream.

Bacteria and Fungi:

Microorganisms like bacteria and fungi possess some mechanisms for storing the energy to deal with the limited environmental resources; here the glycogen represents the main source for the storage of energy. The nutrient limitations such as low levels of phosphorus, carbon, sulfur or nitrogen can stimulate the glycogen formation in yeast. The bacteria synthesize glycogen in response to the readily available carbon energy sources with restriction of other required nutrients. The yeast sporulation and bacterial growth are associated with glycogen accumulation.

Metabolism of Glycogen:

The glycogen haemostasis which is a highly regulated process will allow the body to release or store the glucose depending upon its energetic needs. The steps involved in glycogen metabolism are glycogenesis or glycogen synthesis and glycogenolysis or glycogen breakdown.

Glycogenesis or Glycogen Synthesis:

The glycogenesis requires energy that is supplied by Uridine Tri-Phosphate (UTP). glucokinase or hexokinase first phosphorylate the free glucose to form glucose-6 phosphate which will be then converted to glucose-1 phosphate by the phosphoglucomutase. The UTP glucose-1 phosphate catalyzes the activation of glucose in which the glucose-1 phosphate and UTP react to form UDP glucose.

The protein, glycogen catalyzes the attachment of UDP glucose, itself in the glycogen synthesis. Glycogenin contains a tyrosine residue in each subunit that will serve as an attachment point for the glucose further glucose molecules will be then added to the reducing end of the previous glucose molecule in order to form a chain of nearly eight glucose molecules. By adding glucose through α-1, 4 glycosidic linkages the glycogen synthase then extends.

The branching catalyzed by amyloid 1- 4 to 1- 6 transglucosidases is called as the glycogen branching enzyme. A fragment of 6- 7 glucose molecules gets transferred from the glycogen branching enzyme from the end of a chain to the C6 of a glucose molecule that is situated further inside of the glucose molecule and forms α-1, 6 glycosidic linkages.

Glycogenolysis or Glycogen Breakdown:

The glucose will be detached from glycogen through the glycogen phosphorylase which will eliminate one molecule of glucose from the non-reducing end by yielding glucose-1 phosphate. The glycogen breakdown that generates glucose- 1 phosphate is converted to glucose- 6 phosphates and this is the process that requires the enzyme phosphoglucomutase.

Phosphoglucomutase will transfer a phosphate group from a phosphorylated serine residue within the active site to C6 of glucose- 1 phosphate and it will be attached to the serine within the phosphoglucomutase and then the glucose- 6 phosphates will be released.

Glycogen phosphorylase will not be able to cut glucose from branch points, so the debranching will require 1- 6 glucosidase, glycogen debranching enzyme (GDE) or 4- αglucanotransferase which will have glucosidase activities and glucosyltransferase. Nearly four residues from a branch point, the glycogen phosphorylase will be unable to remove the glucose residues.

The GDE will cut the final three residues of the branch and it will attach them to C4 of a glucose molecule at the end of another branch and then eliminate the final α- 1- 6 linked glucose deposit from the branch point.

Glycogen and Diet:

The food is taken, and the activities done can influence the production of glycogen and the way the body will function. With a low- carb diet, the primary source for glucose synthesis i.e. the carbohydrate will be suddenly restricted.

During the start of a low- carb diet, the glycogen stores will be severely depleted which will result in symptoms of mental dullness and fatigue. Then when the body starts to adjust and renew its glycogen stored then the body will return to the normal stage. Any weight loss effort can trigger this effect to some extent.

At the starting of a low- carb diet, the body will experience a huge drop in weight which will plateau and may even increase after a period of time. This is mainly because of the glycogen which will be composed mainly of water that will be 3- 4 times the weight of glucose itself.

The rapid depletion of glycogen at the beginning of the diet will trigger the rapid loss of water weight. Then, when the glycogen stores are renewed, the water weight returns causing weight loss to halt. It is necessary to keep in mind that this is caused by the temporary gain in water weight and not the fat and the fat loss can continue in spite of this short-term plateau effect.

During exercise, the body undergoes glycogen depletion and most of the glycogen will be depleted from the muscle. So while doing exercise, the persons can use carbohydrate loading which means the consumption of large amounts of carbohydrates in order to increase the capacity for the storage of glycogen. Glycogen is different from the hormone glucagon and it also plays an important role in carbohydrate metabolism and blood glucose control.

How Glycogen is used:

At any time, there will be nearly 4 grams of glucose in the blood. When the level declines, either because of missing any meals or during exercise when the glucose is burnt the insulin level will drop. During this, an enzyme called glycogen phosphorylase will break the glycogen separately in order to supply glucose to the body when it needs.

For the next 8- 12 hours, the glucose derived from the liver glycogen will be the main source of energy for the body. Out of all the body organs, the brain will use more than half of the blood glucose during inactivity and nearly 20% of it during an average day.

Metals and Nonmetals

Metals and Nonmetals – Types, Properties and Differences

Introduction:

Every object around us can be categorized into two types of elements: metals or non-metals. Your books, clothes, pencil, water bottle, bag, table, the door are all examples of non-metals. Therefore, it is important to know the properties of Metals and Non-Metals and how to distinguish between them.
Metals and Nonmetals - Types, Properties and Differences 1

The periodic table:

The periodic table comprises an arrangement of elements based on certain chemical properties that they exhibit. The metals are arranged on the left side and the non-metals on the right side of the periodic table. The rows of the table are called periods and columns are called groups. There is a total of 92 elements that are known to be found naturally, out of which 70 are metals and 22 are non-metals.

Metals:

In the above depiction of the periodic table, most of the elements are metals. There are various kinds of metals:

  • alkaline earth metals,
  • alkali metals,
  • transition metals,
  • actinides, and
  • lanthanides

Metals and Nonmetals - Types, Properties and Differences 2
Metals which are placed on the left-hand side of the periodic table are separated from non-metals by a zigzag line that starts from Carbon (C) and runs down Phosphorus (P), Selenium (Se), Iodine (I), till Radon (Rn). Therefore, these chemical elements and everything on their right is non-metal and the row just to their left is known as semi-metals or metalloids. They have properties that are common to both metals and non-metals.
Metals and Nonmetals - Types, Properties and Differences 3

Physical Properties:

  • Metals occur in the solid state. All metals are solid except with an exception for mercury which is in liquid state in its natural form.
  • Metals are malleable in nature. They can be beaten into thin sheets. For example, elements such as aluminium, gold, and silver can be beaten into thin sheets for common usage purpose.
  • Metals are ductile. This means that metals can be stretched into thin wires. We can make copper wires and aluminium wires. All metals are equally ductile. Only that some metals are more ductile than others for which they are used for day to day purposes.
  • Metals conduct heat and electricity. It is by virtue of this property of metals that heat, and electricity can pass through them. Every metal is a good conductor of heat and electricity.

Note: Silver is the best conductor of heat and electricity, copper is also a good conductor. The worst conductor of heat is lead whereas Iron and mercury are poor conductors of electricity.

  • Metals are shiny. It is due to this property of metals that they are lustrous, and they reflect the light incident on its surface. Also, metals can be polished, and this is one of the reasons why metals are used to make jewellery and desired by women and men alike.
  • Metals are very strong and hard, exceptions being sodium and potassium. They can be cut with a knife.
  • Metals are also known to be heavy.
  • Metals are also sonorous. They produce a sound when they are rung or hit with any object.
  • Metals have a high melting point and a high boiling point.
  • Metals have high density.
  • Metals in the form of objects are opaque and are never transparent or translucent.

Chemical Properties:

  • Metals easily corrode very easily and fast.
  • Metals lose electrons easily. Their outer shell has 1, 2 or 3 electrons.
  • Most metals form metal oxides when they come in contact with the oxygen.
  • Metals have low electro-negativities, they are electropositive elements.
  • Metals are also good reducing agents.

Non-Metals:

The non-metal elements are those that do not possess the properties of metals. The number of non-metals on the periodic table is very less as compared to metals. Non-metals are positioned on the right side of the periodic table. Some examples of the non-metals are hydrogen, carbon, nitrogen, phosphorus, oxygen, sulphur, selenium, all the halogens, and the noble gases.
Metals and Nonmetals - Types, Properties and Differences 4Metals and Nonmetals - Types, Properties and Differences 5

Physical Properties:

  • Non-metals are brittle and break into pieces when beaten. Example: Sulphur and phosphorus.
  • Non-metals are not ductile so, they cannot be made into thin wires.
  • Non-metals are insulators or poor conductors of electricity and heat because they do not lose electrons to transmit the energy.
  • At room temperature, they can be in the state of solids, liquids or gases.
  • They are non-sonorous.
  • They can be transparent.

Chemical Properties:

  • Non-metals generally have somewhere around 4 to 8 electrons in the outer shell.
  • Non-metals tend to gain or accept valence electrons.
  • When they are exposed to oxygen, non-metals react with oxygen to form acidic oxides.
  • Non-metals have high electro-negativity; they are electro-negative elements.
  • Non-metal elements are good oxidizing agents.
  • These elements do not react with water.

Comparison of physical properties of metals and non-metals:

Property type Metals Non-metals
Physical State Solid at room temperature. Exception being mercury and gallium. Exist as solids and gases, exception being bromine.
Density Highly dense Low.
Melting and boiling points High melting point and boiling point Exception being gallium and caesium. Low melting point and boiling point. Exception being diamond and graphite.
Malleability and Ductility malleable and ductile not malleable or ductile.
Conductivity Conducts heat and electricity Poor/ bad conductors of heat and electricity exception being graphite.
Lustre Shining lustre They have no lustre except for iodine.
Sonorous sound Sonorous. Non-sonorous.
Hardness Generally hard exception being Na, K Generally soft except diamond

Comparison of chemical properties of metals and non-metals:

Reaction type Metals Non-metals
Reaction with H2O Metals on reacting with water form metal oxides or metal hydroxides and release H2 gas. Non-metals cannot give electrons to hydrogen in water to be released as H2gas. Non-metals have no reaction with water.
Reaction with O2 Metals react with oxygen to form basic oxides.Zn and Al form amphoteric oxides which show the properties of both acidic and basic oxides.Mostly, metal oxides are insoluble in water. Some of them dissolve to form alkali. Non-metals react with oxygen to form oxides.Non- metal oxides are soluble in water. They dissolve in water to form acids.
Reaction with acids Metals react with acid to form salt and release hydrogen.When metals react with HNO3, H2 is not released. HNO3 is strong oxidizing agent. No reaction with acids occurs to release H2 gas. Non-metals don’t lose electrons to give it to hydrogen ions of acids.
Reaction with salt solutions When metals react with salt solution, more reactive metals displace less reactive metals from its salt solution. Here, more reactive non-metals displace less reactive non-metals from its salt solution.
Reaction with chlorine Metals react with chlorine to form metal chloride. It is an ionic bond.What we get is an ionic compound Non-metals react with chlorine to form non-metal chloride. It forms a covalent bond. What we get is a co-valent compound.
Reaction with H2 Only highly reactive metals react with hydrogen to form metal hydride. Non-metals react with hydrogen to give hydrides.

Table of reactivity series shows order in which the metals are arranged based on their comparative reactivity.
Metals and Nonmetals - Types, Properties and Differences 6
Steps involved in the extraction of metals from the ore:
Metals and Nonmetals - Types, Properties and Differences 7

Calcination and Roasting:

Calcination Roasting
In this process, ores are heated in the absence of oxygen where metal oxide is formed and CO2 releases.It is done for carbonate ores CaCO3 → CaO + CO2(g) In this process, sulphur ore is heated in the presence of oxygen. Metal oxide is formed and SO2 gas releases.It is done for sulphide ores. ZnS+ 3O2 heat 3ZnO+ SO2

Questions

1. Take samples of Fe, Cu, Al, Mg and note the appearance of each sample.

2. Give an example of each:

i. Metal which is liquid at room temperature.

ii. Metal which can be easily cut with knife.

iii. A metal which is a good conductor of heat.

3. Explain the meaning of malleable and ductile.

4. What do you mean by displacement reaction?

5. Give one example of displacement reaction.

6. If you have ever seen a blacksmith beating an iron piece? What change did you find in the shape of these pieces on beating? Would you find a similar kind of change in wood log on beating?

7. Name two most malleable metals.

8. Prove the fact that metals are good conductors of electricity activity comes into equation.

9. List some physical properties of the metals.

10. Write some physical properties of non-metals.

11. What happens when sodium and water.

12. Why non – metals do not react with water?

13. Fill in the blanks:

i. Non- metal oxides are ……………… in water.

ii. Non-metals don’t lose electrons to give it to hydrogen ions of ……….

iii. In this calcination, ores are heated in the absence of oxygen where metal oxide is formed and ………………… releases.

iv. In roasting, In this perocess, metal oxide is obtained and ……………….. gas releases.

v. When metals react with salt solution, more reactive metals …………………. less reactive metals from its salt solution.

vi. Non-metals are …………… and break into pieces when beaten.

vii. Non-metals are not …………… so, they cannot be made into thin wires.

14. Give three reasons for the following:

(i) Why sulphur is a non-metal?

(ii) Why magnesium is a metal?

(iii) You are given three different samples of metals. Sodium, magnesium and copper. Write any two activities to arrange them in order of decreasing activity.